beniroquai / Open-Oxygen-Flowsensor

This will be an open-source oxygen flowsensor

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Open beniroquai opened 3 years ago

beniroquai commented 3 years ago

Idea:

Have a two-point calibration procedure (no oxygen => O2=0%) vs. air (21%)
Trigger calibration through GUI running on the ESP32 webserver or mechanical button? Restore?

mahip-nicn commented 3 years ago

Adding more ideas :)

If the sensor has been through span-calibration after production, a single-point calibration (20.9 %) at standard air should be enough. Source.
Can a 3-point calibration/cross-validation graph be used? Assuming medical O2 cylinders give purity ~ 97% (the 3rd point). Maybe these 3 points can test the oxygen sensor right off the box? Then, do a single-point test (20.9%) for most O2 analyzers. O2 Cylinder's availability should not be an issue?